Owners manual

Exhaust System Installation
Cat Back Exhaust System
Subaru GR STI Sedan
PN 14863
Full Exhaust System
2.5” Full Exhaust Dual Rear Exit
Audi B8 S4, S5 3.0T
PN 14543, 14543BLK
02/02/15
INS5300
CORSA Performance · 140 Blaze Industrial Pkwy · Berea, OH 44017 · P: [phone] · F: [phone]
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E - M a i l : s a l e s @ c o r s a p e r f o r m a n c e . c o m · w w w . c o r s a p e r f o r m a n c e . c o m
Installation of CORSA Exhaust System:
NOTE: Apply the anti-seize lubricant (supplied) to the threads ONLY of all the clamps and flange bolts. Failure to
follow this procedure can cause nuts to seize on clamps and potentially destroy threads. After applying anti-seize
lubricant, be sure to thoroughly clean your hands, as lubricant will tarnish stainless steel. All clamps should be
tightened using a properly calibrated Torque Wrench. Using an air impact gun will
damage the clamp and reduce its ability to effectively seal the joint. It may also
cause the joint to separate, thereby causing damage to your exhaust system and
to your vehicle.
NOTE: Align all clamps so that the center of the clamp bolt is 90 degrees from the
notch in the pipe. (See Fig. CLAMP)
12. Remove all exhaust system components form the shipping carton, including the
eight 2.5” exhaust clamps, and the downpipe flange gaskets, bolts, lock
washers, and nuts.
13. Locate the CORSA downpipe assembly for the driver side, the flange gasket, 3 flange bolts, nuts, and lockwashers.
Place the flange bolts with lockwashers through the factory bolt holes on the factory catalytic converter flange, with
the head of the bolts toward the catalytic converter side. Use the bolts to align the new gasket and CORSA downpipe
flange to the factory connection point. Hand-thread the three flange nuts onto the flange bolts. Using a 13mm
socket and a 13mm wrench, loosely snug the flange bolts at this time. (Fig N, O)
14. Repeat step 13 for the passenger side downpipe assembly. (Fig P, Q)
15. Locate the CORSA Crossover Pipe “X-O Pipe” assembly and two 2.5” clamps. Slide one clamp over the outlet of each
downpipe. While supporting the rear of the XO-Pipe using a jackstand or other support and with the XO-Pipe bracket
facing up, slide the expanded ends of the XO-Pipe assembly over the outlets of the downpipes. Now, slide the
clamps over the pipe expansion and loosely snug the clamps using a 15mm socket and ratchet. Keep the XO-Pipe
supported until installation is complete. (Fig R, S, T, U, V)
16. Locate the CORSA tunnel muffler assembly and two 2.5” clamps. Slide on clamp over each inlet of the tunnel muffler
assembly. Insert the hangers into the factory rubber grommets. A Soapy water solution will aid in the installation
process of the hangers. While supporting the rear of the tunnel muffler, loosely snug the 2.5” clamps at the front of
the tunnel muffler assembly using a 15mm socket and ratchet. Keep the tunnel muffler supported until the
installation is complete. (Fig W, X, Y, Z, AA)
17. Locate the CORSA passenger side axle pipe and one 2.5” clamp. Slide the 2.5” clamp over the expanded end of the
axle pipe and slide the expansion over the passenger side outlet of the tunnel muffler. Loosely snug the clamp using
a 15mm socket and ratchet. (Fig BB, CC)
18. Repeat step 17 for the CORSA driver side axle pipe. (Fig DD, EE, FF)
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